Chapter V Disassembly & Repair
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Oil-film clearance of big end of connecting rod (radial direction)
1) Clean the surface of crankshaft journal and the inside oil.
2) Set plastigauge on crank journal then assemble the connecting
rod, and fasten the bolt as per the specified torque.
Fastening torque: 12 N.m±1 N.m
Note
3) Disassemble the connecting rod and measure the thickness of
plastigauge.
4)
When the clearance exceeds the maintenance limit, replace
the connecting rod and check the clearance again. If the clearance
still exceeds the maintenance limit after using new connecting
rod, grind the crankshaft journal and use the connecting rod less
than the standard value.
Detection of camshaft
The camshaft is the main engine drive element of valve mechanism of gasoline engine, controlling inlet or
exhaust valve to open or close in a regular manner.
For appearance, check whether the cam surface and the height is damaged, whether the camshaft and bearing is
loose and worn. If yes, change the whole unit.
Height of camshaft
Standard
Maintenance
Limit
Inlet
29.95~30.05mm 29.75 mm
Exhaust
29.95~30.05mm 29.75mm
Standard Maintenance Limit
0.039-0.064 mm 0.083mm
Don’t rotate the crankshaft when fastening the connecting-rod bolt.
Calibrate with torque wrench in N+1 way and conduct 100%
inspection to the crankshaft to see if it rotates flexibly.
Plastigauge
12 N.m±1 N.m
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